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Simplifying -5(r + 2) = -66 Reorder the terms: -5(2 + r) = -66 (2 * -5 + r * -5) = -66 (-10 + -5r) = -66 Solving -10 + -5r = -66 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + -5r = -66 + 10 Combine like terms: -10 + 10 = 0 0 + -5r = -66 + 10 -5r = -66 + 10 Combine like terms: -66 + 10 = -56 -5r = -56 Divide each side by '-5'. r = 11.2 Simplifying r = 11.2
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